There are two distinct printings of the "violet Nevada" checks. The one at the top has a dateline of 186_ where the bottom one has 187_, and the borders are different (see below.) The colors are different as well. Several students of revenue stamped paper argue that the paler color of the earlier checks is due to fading or water stain, but the three copies I have seen exhibit a uniform dull violet shade in contrast to the later printing. Both copies I have seen of the dark violet color are dated 187_. (The copy of the dark violet type shown here is courtesy of Hermann Ivester.)

A detail of corners of both checks to show that there was a distinctive second printing, not just a change in dateline. This contributes to my belief that the two printings were done in different colors, including the State revenues, and that they could be given different minor numbers in the catalog.